On your page for the Bag of Bones UK S/L, you state the bookplates were pasted into 2nd edition trades. But the copy I recently received has a full number line from 10 to 1. It would appear to be a first printing instead of a second.

That's a mistype, I double checked George Beahm's guide just to make sure. It should read
The original UK limited edition wound up being canceled. However when SK went to England for a book tour he signed 2,000 bookplates that H&S pasted onto their 1st trade edition. Thus creating a limited edition (of sorts).

I hate to mention it, but the UK Bag of Bones page now contradicts itself. It has the statement you added about the 1st edition books, but the bullet point just above that still says it used 2nd editions.

The U.K. limited edition page for WIZARD AND GLASS states that this red edition was issued with a "matching slipcase." My copy, and a couple others I checked with, indicate that it was issued with a black slipcase.